Liquid-fuel-atomizing device



Am. B7, w23,

W. W. WILLIAMS LIQUID FUEL ATOMIZING DEVICE 6 Sheets-Sheet 1 Filed OCC-8, 1920 msmgs W. W. WILLIAMS l LIQUID FUEL 'IOMIZING DEVICE pr., w,i923.

Filed oct. 8,'

EASLYQS prf. l?, 1923.

W. W. WILLIAMS LIQUID FUEL ATOMIZING DEVICE Filed Cet. s, '1920 esheets-sheet s Apu'. 117, 1923. v

W. W. WILLIAMS LIQUID FUEL ATOMIZING DEVICE Filed oct. s, 1920 esheets-sheet 4 HAMJ@ py. N, w23.

wv vv. WILLIAMS LIQUID FUEL ATOMIZING DEVICE,

Filed' o l dh 6 Sheets-Sheet 5 I W. W. WILLIAMS n LIQUID FUEL ATOMIzNGDEVICE AW. im m3.

1920 6 Sheets-Sheet 6 Filed oct. s,

i df 0.

Patented Apr.. l?, i923..

Unir as WALTER W. WILLIAMS, OF BLOOMINGTON, ILLINOIS.

LIQUID-FUELATOMIZNG DEVICE.

Application filed October 8, 1920. SerialNo. 415,501.

with the ordinary furnace, being used either alternately therewith orthereof.

The object of the invention is to produce a liquid fuel atomizer burningany fuel oil and capable of practical use either in conjuncindependentlytion with the ordinary house furnace or with' larger heating plants.

Another object of the invention is to provide a special pump arrangementto provide a constant supply of fuel oil to the device, regardless ofthe qualityof fuel oil used.

Yet another object is to provide a special electric switch mechanism inconnection with a pressure switch diaphragm and a thermostat forautomatically regulating the operation of the device.

Other objects will hereinafter appear.

The invention consists in the parts and the construction and combinationof parts as hereinafter more fully described and claimed, in which- Fig.1 is a side elevation of the device;

Fig. 2 is a side elevation of the device, the burner being shown insection to bring out more clearly the special deecting means for theflame;

Fig. 3 is a front elevation of the device;

F ig.. d is a longitudinal sectional view of the switch diaphragm andpressure diaphragm, including electric connections therefor;

Fig. 5 is a detail plan view of a portion of the switch mechanism;

Fig. 6 is a longitudinal sectional view on the line 6 of Fig. 3;

ug. 7 is a cross sectional view taken on the line 7-7 of Fig. 6;

Fig. 8 is a sectional view taken on the liney 8 8 of Fig. 7;

Fig. 9 is a detail end view of the plunger and its manner of seating inthe rotor of the oil feed pump;

ig. 10 is a sectional View on line 10-10 of Fig. 6;

Fig. 1l is a detail front elevation of the rotor in the oil feed pump;

F ig. 12 is a sectional view on the line 12-l2 of Fig. 2; and

Fig. 13 is a sectional 13-13 of rig. 2.

Referring to the drawings in detail, A indicates an electric motormounted on a base B, and C a bowl shaped burner. A rotary pressure pumpD is mounted in conjunction 'with the electric motor, the shaft of themotor furnishing the axis for'the pump and designated as 1. A rotator 2is mounted on the axis in eccentric relation with a cylinview on theline der 3, and rotates within cylinder 3, said cylinder having a baseplate d which is attached in any suitable manner to the electric motor.A plate 5 closes the forward end of the rotary pump, making an air tightenclosure. The rotator 2 has three or more longitudinal slots indicatedat 6, said slots being parallel to the axis and running the full lengthof the rotator. ln these slots are laminated yvanes 7, slidable thereinand acting as a seal under the inuence of centrif-l ugal force when thepump is rotating.

When the motor is started and the pump rotated, pressure is raisedtherein which is communicated through outlet Sand connection 9 to therear face of a diaphragm 10 mounted in a primer diaphragm casing 11.Within this casing and connected to the diaphragm at 12 is a shaft 13.`Surrounding said shaft is a coil spring la, which is held at its outerend in a suitable bearing 15 conforming to the shape of the spring, saidspring at its other end abutting the outer face of the diaphragm 10.rlhe spring is of such strength as to be capable of thrusting thediaphragm inwardly when there is no pressure against the inner facethereof, but not strong enough to resist a certain determinable prestureraised against the inner face of the diaphragm when the rotary pressurepump is inv operation.

A priming fluid container 16 is mounted in any suitable manner inconnection with the device and has the connection 17 with elbow 17JLtherein, including a ball check valve 18` and short connection 18a, witha priming chamber 19 mounted in any suitable place on the base plate. B.A tube 20 and opening 21 connect the priming chamber with the chamberwithin the primer diaphragm casing on the outer side of the di aphragm10 therein. The pressure that is lll) It may be said in explanation herethat the cessation of action of the motor and rotary pressure pumpreleases the pressure Vagainst the rear face of the diaphragm '10 andthe actionof the spring 14 against its outer face creates a vacuumwithin the connection 20 and priming chamber 19, thereby causing primingfluid from the container 16 to be drawn into the priming chamber 19. Itis therefore seen that the priming chamber is alwaysxfilled at thestopping of the device so that it may be there in readi- 2 ness to befed to the pressure pump when the motor is started. 4

It may be said in this connection that fuel oil, which is usually lowgrade, is not capable of being ignited at low temperatures and tofacilitate an immediate ignition of the fuel mixture, it is necessary tohave some fuel which is easily ignitable, and therefore the primingmechanism is introduced to lprovide a temporary feeding of `a quicklyignitable fuel in connection with the main fuel oil, the immediateignition of the priming fluid heating the main oil, which 1s introducedin conjunction with it, to such a temperature that it may also beignited. It may also beseen that as the cessation of the action of thepump with a consequent reduction of pressure within the primerdiaphragm, is necessary to the filling of. the priming chamber that onlythe amount of priming mixture contained in the priming chamber at onetime will be used, thus providing merely a temporary ignitionpreparatory to the lighting of the main fuel oil.

The priming mechanism,`which has just been described, is merely an aidto the oil feed which is now to be described. The fuel oil is containedin a tank, not shown, which has a communicating tube 26 to the outerface of the rotary pressure pump. The plate 5, which forms the end wallof the rotary pressure pump, also forms the base plate forthe oil feedpump. This plate has integrally formed therewith the outer cylinder 27of the pump, and mounted on the outer end of said cylinder is theend'plate 27B. A plug 27b is centered in this plate, saidplug havingmounted on its inner face a socketcontaining a ball 27 c, whichl isyieldingly held by a spring 27d against a rotor to be described; later,said ballbeing an auxiliary means to aid in truing the rotary movementof said rotor.y lt is' noted that the cylinder is of a reduced diameterto that of the rotary pressure pump. A rotatable shaft 28 is keyed inany suitable manner to the axis 1 of the pressure pump, which is alsothe main shaft of the electric motor,

said rotatable shaft forming the axis of the oil feed pump. Integrallyor otherwise mounted on said axis is-a rotor 29. This rotor is ofsmaller diameter than the cylinder casing 27.

As shown in Fig. 8, a plunger 30 is slidably mounted within a plungersocket 31. The plunger socket has mounted therein a coil spring 32, saidsplrinnr abutting the inner end of the plunger. The outer end of theplunger is rounded in such a manner as to present as great a bearingsurface as possible. A key 33 is mounted in the upper end portion of theplunger, said key fitting in a corresponding groove 34 in the outersurface of the rotor. An aperture 35 forms a connection between thechamber formed by the spring at the inner end of the plunger socket andthe oil supply chamber 36.l The fuel oil is supplied to'thisf chamber 36through the supply tube 26, there being a gasket 37 between the supplychamber and the inner surface of the rotor said gasket having formedtherein aA large arcuate slot 38 which registers with the hole 35 on therotor 29, at certain times during the movement of the rotor. This slotis so shaped as to provide sufficient oil feeding surface. The gasketalso has a smaller arcuate slot 39, which registers at certain timeswith the hole 35 on the inner side of the rotor.

Communicating with. the smaller arcuate slot land leading therefrom isan outlet 40. Projecting through the cylinder casing 27 of the oil feedpump is an Aadjustable lug 41 which forms a cam surface in connectionwith the outer end of the plunger 30. A sprlng band 42 on the inner sideof the cylinder casing rides over the inner end of lug 41, formingthereby a smooth cam surface to prevent anyadditional jar when the endof the plunger 30 strikes it, as the rotor passes by the cam. It will beseen from the above description that the constant movement of the rotorwith the cam and plunger means produces -a pumping action of the plungerwithin the rotor, and there is a continuous suction stroke of theplunger wherein the oil is taken in through the large arcu- -ate slot 38anda power stroke when the end of the plunger strikes the lug 41, and

4driving the plunger downwardly, forces oil taken within the] lowerchamber outwardly through the slot 39 and voutlet 40. The lug 41 beingadjustable, is capable of regulating the flow of oil from the pump. Thelug, however, being once set to produce a determined and etlicient flowof oil, need not be changed should different grades of oil be used. lnother words, no matter what kind or grade of oil is used, the same timewill be consumed by the pump in feeding it to the rotary pressure pump,and the efficiency of one oil over another will appear in the heat givenou when the mixture is burned, the same time, however being consumed bythe oil feed pump for the same volume. The outlet has a connection 43having suitable elbows and joints therein to carry the oil to the sightfeed cup 24,'and then through the opening 25 to the rotary pressurepump.

An air inlet means is designated at 44, wherein air is introduced intothe oil feed. at a point just below the sight feed cup.

The action of the rotary ,pressure pump on the mixture of air and oilwhich is introduced through the opening 25 is such that the mixture iscompletely atomized within the pump and p-laced under a. high pressure.rthe fuel mixture is then taken from the pump through the opening 8 tothe tube 45, wherein it is carried to the nozzle 46 within .the burnerC, said nozzle projecting into the burner at an angle thereto, as shownin F ig. 13 of the drawings. A by-pass a connects the tube 45 with thefuel intake. tube that enters the oil pressure pump at the inlet 25.This by-pass provides means for taking olf any excess air pressure theremay be in the fuel mixture and passing it back to the intake tube. llthas been found that this by-passing of the excess preure of air in themixture pre-.

rive-nts to' a. great extent the noise in the burner, and hence aIcomparatively quiet device is the result.

A. special bracket arrangement 47 is mounted on the burner to receivethe angularly injected nozzle, the outer end of said bracket tbeingcircular in formation and capable of a tight fitting connection with aplate 48 slidable on the tube 45, said plate being adjustably mountedwithy relation to the outer end face of the 'bracket 47 by means of therod 49 and adjustable yoke and K screw means 50 slidable also on thetube 45. rllhe above described means furnishes an auxiliary draft meansfor the nozzle and may be useful under some conditions, the normaloperation of the device, however, requiring that the draft plate 48 betight against the outer end of the bracket 47.

A pilot light 51 projects through the plate 48 passing beneath thenozzle, andl parallel to it, the flame from said pilot being partiallyin the fuel spray ejected from the nozzle.

The burner C mounted within the furnace has any suitable draft means 54entering the lower portion thereof. An oil drain pipe 54 is mounted in`such a manner 1n connection with the bottom of the burner that anyunburned fuel oil that might accumulate in the bottom of the burner willbe drained ofi' through said pipe. V

The liquid fuel atomizing device above described is automaticallyoperated byl an electric switch arrangement in connection with a switchdiaphragm and a thermostat of known construction.l A ,switch diaphragmcasing 55 is mounted in connection with the primer diaphragm casing 11,communicating therewith through the connection 56. A pressure gage 56"is mounted in conjunction with said diaphragm and indicates, throughconnections before described, the pressure as set up within the rotarypressure pump.

Within said casing 55 is mounted a switch diaphragm 57. The diaphragmcasings above mentioned are suitably mounted on a base 58, as are theother portions of the switch subsequently to be described. The inner endof the switch diaphragm casing has a cylindrically shaped bracket 59mounted in connection therwith. Slidable within said bracket i's a shaft60, said shaft being connected at its inner end to the diaphragm 57. Acoil spring 61.surrounds the portion of the shaft Within the bracket andabuts at one end the bracket 59 and at the other` the switch diaphragm57.

The shaft 60 has formed thereon the notches 62 and 63, said notcheshaving an Vinterlocking engagement with a vertically disposed rod 64,said rod having at its upper end a lug capable of entering said notches.rlhe rod 64 has an enlarged portion 65a slidable within a socket in anelectro-magnet 65h mounted beneath the bracket 58. In the lower portionof said socket and abutting the portion 65 is a coil spring 66. A toggleswitch 67 of standard construction is mounted on the plate58, theelectric connections for said switch not being shown, but of coursebeing in connection with the electric. motor A. The switch 67 has atoggle lever 68, said lever being pivotally connected to al groundcontact 69, said contact being connected at 70 to the outer end of therod 60. 71 and 72 represent insulated elect-ric contacts having suitableengagement plates 78 and 74 respectivelyv for contact with the groundcontact 69. The insulated electric contacts have suitable bracket meansholding them in position above the plate 58.

A. thermostat 75 of ordinary construction has the arm 76 capable ofmovement between they Contact points 7 7 and 78, rep.- resenting merelyas an example the tem-- peratures 70 and 80. rllhe operation of theswitch in connection with the thermostatv will be brought out later whenthe operation of the device is described.

Under normal conditions` the thoroughly atomized fuel mixture dischargedfrom the nozzle within the burner C, travels approximately parallel tothe inner wall thereof,

causing the flame to travel about the surface of the chamber. Thismanner of injecting the fuel mixture will take care of all normalconditions and will produce a very efficient burner. A special means isshown here, however, for more thoroughly deflecting the fuel mixtureejected from the nozzle. This means has a shaft 7 9 mounted in a socketin a bracket 80, said bracket being held by suitable mountings 81 on thebottom of the burner. The shaft 79 has a ball l82 integrally mountedtherewithat its upper end. Surrounding said ball is aI bearing portion83 conforming to the diameter of the ball and capable of rotary movementabout said ball. Bearing portion 83 has either integrally, or otherwise,connected thereto, the plate 84, said plate having arms 85 radiatingtherefrom. The outer ends of the arms 85 have wings 86 mounted thereon,said wings being bent at such an angle that they will absorb the fullblast from the nozzle which is set at such an angle in the burner todischarge directly against them.

To make possible the 'rotation of this special deflector, under theterric heat that isdeveloped within the burner, a graphite packingsurrounds the ball 82 and provides a bearing surface for the portion 83which will not be affected by high temperatures or variations oftemperature.

For a more complete understanding of the atomizer, its operation isrecited:

The device, as has been brought out in the statement of the-invention,is for use in conjunction with the ordinary furnace, the electric motorand pump means being mounted without the furnace, and the burner andnozzle within it. An oil supply tank (not shown) furnishes a continuoussupply of fuel oil. A thermostat of ordinary construction furnishes themeans for operating the special electric switch for automaticallystarting and stopping the device. In an attempt to keep a house, forinstance, at a normal temperature, say between 70 and 80 degrees` itwill not be necessary to use the device continuously, in other words,

when it is in operation and has raised the temperature of a house toeighty degrees, the thermostat, in conjunction with the special electricswitch described will automatically shut off the device, and again,

vwhen the temperature of the house has dropped to, say, 70 degrees, thethermostat by its action through the special switch,

This.

will automatically start the device. intermittent action ofthe devicekeeps the house at a slightly varying temperature and acts in an eicientman-ner in regard to the fuel supply.

In describing the operation of the device,

we will sa that the temperature of the house which is eing heated, hasfallen to 70 `degrecs, whereupon the arm 76 strikes the point 77 ,makingcontact therewith. With reference to Fig. 4 of the drawing, which showsin detail the special switch mechanism, when the device is not inoperation, we see that when the contact is made between the arms 76 and77 through the batteries F, the electro-magnet a is charged, therebywithdrawing the rod 64.- from the notch 62 in rod 60. Immediately uponthe withdrawal of the rod 64'from the notch 62, the coil sprin 61 forcesthe switch diaphragm 57 inwar ly. The rod 60, by its inward movement,and its connection with the lever 68 of the toggle switch 67, throwssaid switch on and the electric motor A of the atomizing device isstarted. The shifting .of rod 60 inwardly also withdraws the groundcontact 69 from its contact point 74 and breaks the circuit which wasset up when the arm 7 6 of the thermostat contacted with the point 77.This breaking of the circuit releases the vertical rod 64, which wasdrawn downwardly by the electro-magnet and by the pressure of the spring66 beneath it, the rod is forced upwardly, interlocking now, however,with the notch 63 on the rod 60, the latter having beenl forced inwardyby the action of the spring 61 as described.

The toggle switch 67 having been thrown to an on position and theelectric motor of the device started, the action of, the rotarylpressure pump and oil feed mechanism starts simultaneously therewith.Pressure is raised almost immediately within the pres-` sure pump, andthis pressure, through the outlet 8 and connection 9, is transmitted tothe rear of the primer diaphragm 10, said diaphragm being drivenoutwardly, overcoming the spring 14 and putting pressure through theconnection 20 on the priming chamber 19 containing the priming charge.The priming fluid is forced through the connection 23, said connectionhaving a ball check 22 therein, through the sight feed cup 24 throughtheinlet 25'to the rotary pressure pump. As has been stated before, thisintroduction of the priming fluid into the pressure pump is merely atemporary fuel feed to enable themain fuel oil to be ignited.

The feeding of the main fuel oil takes place simultaneously with theoperation of the electric motor, rotary pressure pump and the oil feedpump, all being operable from the same shaft. Fuel oil from the supplytank, not shown, is transmitted to the fuel rotor 29 has a hole 35therein, which comi municates with the' chamber formed by the action ofthe spring 31 against thev inner iao A Meigs/ee end of the plunger 30,said opening also re istering withthe arcuate slot 38 at eac revolutionof the rotor. Slidably mounted in the socket in the rotor is the plunger30, said plunger having a large bearing surface at Aits outer end, aspreviously described. Projecting through the cylinder casing whichhouses the rotor is the adjustable lug 41, Which has the spring band 42riding over it and encasing the inner surface of the cylinder. At eachrevolution of the rotor, the end of the plunger 31 strikes the inwardlyprojecting end of the lug 41 and thereby receives its downward thrust. Asmall arcuate slot ,39 in the gasket 37 registers with the hole in therotor just as the plunger 30 receives its downward thrust, and the oilcontained in the rotor beneath the `plunger is forced through saidopening through suitable communicating tubes and sight feed to the inlet25 of the rotary pressure pump. The plunger within the rotor, in itsdownward stroke having contacted with the inner end of the lug 4l drivesthe oil out of the oil feed pump. However, the end of the plunger havingridden by the lug 41, the coil spring 31 within the plunger socketthrows the plunger outwardly, thereby forming a vacuum within'the innerend of the socket, and when the opening 35 registers with the opening 38communicating with the fuel supply, oil is dra-wn into the chamber.' Dueto the high speed at which l the oil feed pump operates, the oil will beplaced under suitable pressure to force it to the rotary pressure pump,and also due to the special arrangement of said pump, a constant volumeof fuel oil will be introduced to said pressure pump. w As has beenstated before, the same vol-l ume of oil will be fed by the oil feedpump to the pressure pump, regardless of quality.

Just before the entrance of the fuel oil to the pressure pump, airthrough the air inlet 44 is mixed with it and together they arethoroughly atomized within the pump, being ejected therefrom under ahigh pressure, through the` outlet8 to the tube 45 aving the nozzle 46thereon projecting into the burner in an-angul ar relation thereto.IThis nozzle 46 is formed in' such a manner that the thoroughly mixedfuel will be ejected into the burner in a cone shaped spray. The fuelmixture ejected from the nozzle at a high pressure is immediatelyignited by the constantly burning pilot light 51 directly beneath thenozzle. As has been stated before, the primingk fluid, which is firstejected from the nozzle along with the main fuel oil, permits the fuelmixture'to be ignited immediately.

We now see the device in operatien and generating a heat within theburner ,that onsequently raises the temperature of the ouse.

We will say now that the temperature of the house has been raised toeighty degrees and the arm 76 of the thermostat makes contact with thepoint 7 8. This contact having been made, an electric circuit is set upthrough the batteries F which again charges the electro-magnet 65,thereby withdrawing the rod 64 from its corresponding notch 63, andhence vthe .pressure which has been raised against the inner surface 'ofthe diaphragm 57 by the action of the rotary pressure pump thrusts theswitch diaphragm 57 outwardly, the'action of said diaphragm causing therod 60 to move outwardly and accordingly throw the toggle switch 67through the lever 68 to an off position, thereby stopping-.the electricmotor A and of course the action of the atomizer.

The movement of the arm 60 outwardly throws the ground contact 69 whichhad been in contact with the contact point 73, into contact with thepoint 74, thereby breaking the electric circuit and permitting the rod64, by pressure of the spring 'against its lower end, to be thrustupwardly and to interlock with the notch 62 on the rod 60.

Having thus described the invention, what l claim is:

1. The combination with an electric motor, of a rotary pressure pump, anoil feed pump, a burner, a fuel tube connecting said pressure pump andburner, an air inlet means, priming mechanism, and electric switchmechanism for automatically starting and stopping said electric motor.

2. ln -a liquid fuel atomizing device, the combination with an electricmotor and a rotary pressure pump, of an oil feeding means for supplyinga constant volume of fuel oil to said pressure pump regardless of thequality of said fuel oil.

3. The combination with an electric motor, of a rotary pressure pump, aburner, a fuel tube connecting said pressure pump and burner, and meansfor supplying a fuel mixture to said rotary pressure pump, vincluding arotary oil feedpump.

4. ln a liquid fuel atomizing device, the combination with an electricmotor and a rotary pressure pump, of a fuel feed pump for said pressurepump, including a cylin- Ader mounted in connection therewith, an

" supplying a constant volume of fuel oil to the rotary pressure pumpregardless of the quality of the fuel oil, and adjustable means forregulating said volume.

6. In a liquid fuel burner device, a burner, fuel oil atomizing meansfor sa-id burner, and means for supplying fuel oil to said atomizingmeans, said means being constructed to automatically ensure a constantrate of supplyto said atomizing means irrespective of the quality of thefuel oil.

7. In a liquid fuel atomizing device, the combination With an electricmotor and a rotary pressure pump, of an oil feed pump, and switchmechanism for automatically starting and stopping said electric motor,including a diaphragm casing, a diaphragm therein, a toggle switch, ahorizontal shaft having connection at one lend with said diaphragm andat the other with said switch, a coil spring surrounding a portion ofthe rod and abutting the diaphragm, a spring pressed vertically disposedshaft having interlocking relation with said horizontal shaft, anelectromagnet .surrounding the lower portion of said vertical shaft, andelectric contact instrumentalities in connection with said magnet foreffecting either engagement or disengagement of said vertical shaft withthe longitudinal shaft.

8. The combination with an electric motor, of a rotary pressure pump, aburner, a

' fuel tube connecting said pressure pump and burner, an oil feed pump,a thermostat, means in connection with said thermostat for starting saidelectric motor at a relatively loW temperature, and means in connectionwith said thermostat for stopping said electric motor at a relativelyhigh temperature.

9. ln a liquid fuel atomizing device, the combination with an electricmotor and a rotary pressure pump, of an oil feed pump, means dependentupon the operation of said motor for supplying oil to said pump, andmeans dependent upon the cessation of operation of said motor forstopping the fuel feed to said pressure pump.

10. rllhe combination with an electric motor, of a rotary pressure pump,a burner, a fuel tube connecting said pressure pump v and burner, an oilfeed pump, means including electric switch mechanism for automaticallystarting said electric motor, and means,

including electric switch mechanism, for automatically stopping saidmotor.

11. ln a liquid fuel atomizing device the combination with an electricmotor of a burner, a rotary compression chamber, means for admittingmixed air and oil thereto, means Within said chamber for compressing thefuel mixture preparatory to discharge to the burner, and means forsupplying a .constant volume of fuel oil tosaid compresber, means forsupplying a constant volume of fuel to said chamber, regardless of thequality of said oil, and means dependent upon temperature variations forcontrolling the action of said chamber and fuel supply means.

13. In a liquid fuel atomizing device the combination With an electricmotor of a burner, means for supplying a contant volume of fuel to saidburner, regardless of the quality of said fuel, including a pumpmechanism for measuring the supply of fuel fed therefrom.

14. In a liquid fuel atomizing device the combination with an electricmotor of a burner, means for supplying a constant volume'of fuel to theburner, regardless of the quality of said fuel, including a pummechanism for measuring the supply of 'uel fed therefrom, and meansresponsive to temperature variations for controlling said fuel feedingmeans.

15. In a liquid fuel atomizing' device the combination with a burner ofan electrically operated means for supplying a constant volume of liquidfuel to the burner, regardless of the quality of said fuel, including apump mechanism for measuring the volume of fuel fed therefrom and meansresponsive to temperature variations adapted to control saidelectrically operated means. y

16. In a liquid fuel atomizing device the combination with a burner, ofelectrically operated means for supplying a constant volume of fuel tothe burner regardless of the quality of said fuel, including a pumpmechanism capable of measuring the fuel fed therefrom and forcing it t0the burner under pressure. l

17. In a liquid fuel atomizing device, in combination, withv anelectrical motor and a rotary pressure pump, of a fuel feed pump,adapted to automatically insure a constant rate of supply to said rotarypressure pump, including a cylindrical housing, a rotor therein, aspring pressed plunger slidably mounted Within the rotor, a cam memberinterposed between the .rotor and housing member, and an adjustablescrew member inserted through the housing and abutting the said cam withthe result that an adjustable means for controlling the stroke of theplunger in the rotor is provided.

18. In a liquid fuel atomizing device, in combination, with anelectrical motor and a rotary pressure pump, adapted to automaticallyinsure a constant rate of supply to said rotary pressure pump, includinga cylinder, a rotor within said cylinder, a springpressed plungerslidably mounted `Within said. rotor mames and cam means interposedbetween the rotor and cylinder.

19. In a liquid fuel burner device, a burner, fuel oil atomizing meansfor said 5 burner and means for supplying fuel oil to said 'atomizingmeans, said means being constructed to insure a constant rate of supplylo said atomizing means, including a cylinder having arcuate shapedinlet and outlets,

a rotor having a fuel cylinder therein, a l@ spring pressed plunger insaid cylinder and a cam surface disposed .between the rotor' andcylinder.

ln testimony whereoiil have *aiiixed my signature.

WALTER W. WILLIAMS.

